Currently, coronary artery bypass grafting has been widely used in patients with coronary heart disease, enabling more and more patients with coronary heart disease to be well treated. However, with the increasing maturity of surgical techniques, patients have been able to better surgical treatment, and it is a new challenge to enhance cardiac function, improve the quality of life and prolong the survival time of patients after surgery. In recent years, cardiac rehabilitation has attracted increasing attention and focus, and has gradually become an important part of the treatment plan for patients with coronary heart disease. When it comes to rehabilitation therapy, many people think of limb function exercises for impaired limb movement after cerebrovascular accidents, speech function training and limb function exercises for children with cerebral palsy, etc. …… However, cardiac function also needs to be exercised after surgery to help patients recover from cardiac function after coronary heart disease surgery. Cardiac rehabilitation therapy, which is gradually attracting industry attention, can help surgical patients recover better and faster. The purpose of cardiac rehabilitation is to restore and improve cardiac function, increase myocardial collateral circulation, reduce disability, reduce recurrence and risk factors, and return to normal work, social life and social activities as soon as possible. If rehabilitation is done well, the patient can quickly return to normal life, make the condition stable for a long time and avoid relapse. If it is not done well, the recovery of heart function will be delayed and life will be seriously affected. Therefore, we should attach great importance to rehabilitation treatment, and make efforts to do a good job in the rehabilitation of patients with coronary heart disease, so that patients can recover their health and live normally as soon as possible, return to society, and prolong their lives. The modern definition of cardiac rehabilitation by the American Public Health Service in 1995: Cardiac rehabilitation is a comprehensive long-term program that includes medical evaluation, correction of cardiac risk factors, education, counseling and behavioral interventions. As you can see, modern cardiac rehabilitation is different from physical therapy or sports and is part of a broader secondary prevention. What kind of patients are suitable for cardiac function rehabilitation? Cardiac rehabilitation is generally considered internationally for patients who have had the following cardiovascular events within the previous year: (1) acute myocardial infarction and/or acute coronary event; (2) coronary artery bypass grafting; (3) percutaneous coronary intervention; (4) chronic stable angina; (5) heart valve repair or replacement; (6) heart transplantation or combined heart and lung transplantation. When to start treatment? The World Health Organization defines cardiac rehabilitation into 3 phases or stages: (l) Phase I (acute phase): In-hospital rehabilitation. It provides prevention and rehabilitation services for patients hospitalized after a cardiovascular event such as acute myocardial infarction (AMI) or acute coronary syndrome (ACS), including hospitalization in the CCU and general ward, for a period of about 10-14 d or less. (2) Phase II (recovery phase) Early out-of-hospital rehabilitation. Provide continued exercise training for patients discharged from the hospital in the early stage (3-6 months) of an acute cardiovascular event, continuing until 1 year after the event. Phase III (consolidation phase): Long-term out-of-hospital rehabilitation. Prevention and rehabilitation services are provided to out-of-hospital patients 1 year after the cardiovascular event and continue for the rest of their lives. Phase II has been further divided into 2 phases: rehabilitation under supervised conditions is called early rehabilitation, which provides strength and mobility until return to work, usually 8-12 weeks, and rehabilitation without supervision, which is called intermediate rehabilitation, which lasts up to 1 year.